Converting number into word, how??

[cess]

Frankly speaking, I have no code about this. I don't know how to start. This should be:

If the user inputs 1, the output is its corresponding word "one".

I need some help!

[r035198x]

Frankly speaking, I have no code about this. I don't know how to start. This should be:

If the user inputs 1, the output is its corresponding word "one".

I need some help!

You need to have some code first to get code help. Write down your algorithm first. You may need to use the % operator.

[cess]

You need to have some code first to get code help. Write down your algorithm first. You may need to use the % operator.

I have now my code, but the problem is: if the user inputs "1500" the output is not "One Thousand Five Hundred", but "1500"and "1Five Hundred"...What is my lacking?? Here's the code

import java.io.*;
  public class conversion
 {
    public static void main (String args[])throws Exception
  {
      String number;
      int amount;
 
       System.out.print("Enter amount not exceed to two thousand: ");
        InputStreamReader no= new InputStreamReader(System.in);
         BufferedReader num=new BufferedReader(no);
         number=num.readLine();
         amount=Integer.parseInt(number);
 
     if (amount>=2000)
     {
         amount=amount-2000;
        System.out.println(number.replaceAll("2000","Two Thousand"));
     }
        if (amount>=1000)
        {
        amount=amount-1000;
         System.out.println(number.replaceAll("1000","One Thousand"));
        }    
           if (amount>=900)
           {
             amount=amount-900;
             System.out.println(number.replaceAll("900","Nine Hundred"));
            }
             if (amount>=800)
             {
             amount=amount-800;
             System.out.println(number.replaceAll("800","Eight Hundred"));
             }
                if (amount>=700)
                   {
                 amount=amount-700;
                 System.out.println(number.replaceAll("700","Seven Hundred"));
                 }
                     if (amount>=600)
                      {
                     amount=amount-600;
                     System.out.println(number.replaceAll("600","Six Hundred"));
                     }
                      if (amount>=500)
                      {
                      amount=amount-500;
                      System.out.println(number.replaceAll("500","Five Hundred"));
                      }
                          if (amount>=400)
                        {
                         amount=amount-400;
                         System.out.println(number.replaceAll("400","Four Hundred"));
                         }
                             if (amount>=300)
                             {
                             amount=amount-300;
                             System.out.println(number.replaceAll("300","Three Hundred"));
                             }
                                 if (amount>=200)
                                 {
                                 amount=amount-200;
                                 System.out.println(number.replaceAll("200","Two Hundred"));
                                 }
                                       if (amount>=100)
                                     {
                                     amount=amount-100;
                                     System.out.println(number.replaceAll("100","One Hundred"));
                                     }
                               if (amount>=90)
                               {
                                amount=amount-90;
                               System.out.println(number.replaceAll("90","Ninety"));
                              }
                          if (amount>=80)
                          {
                           amount=amount-80;
                           System.out.println(number.replaceAll("80","Eighty"));
                          }
                        if (amount>=70)
                        {
                         amount=amount-70;
                        System.out.println(number.replaceAll("70","Seventy"));
                        }
                    if (amount>=60)
                    {
                    amount=amount-60;
                     System.out.println(number.replaceAll("60","Sixty"));
                    }
               if (amount>=50)
               {
               amount=amount-50;
               System.out.println(number.replaceAll("50","Fifty"));
               }
            if (amount>=40)
            {
            amount=amount-40;
            System.out.println(number.replaceAll("40","Forty"));
            }
         if (amount>=30)
         {
         amount=amount-30;
         System.out.println(number.replaceAll("30","Thirty"));
         }
      if (amount>=20)
      {
      amount=amount-20;
      System.out.println(number.replaceAll("20","Twenty"));
      }
      if (amount>=10)
      {
      amount=amount-10;
      System.out.println(number.replaceAll("10","Ten"));
      }
      if (amount>=9)
      {
      amount=amount-9;
      System.out.println(number.replaceAll("9","Nine"));
      }
      if (amount>=8)
      {
      amount=amount-8;
      System.out.println(number.replaceAll("8","Eight"));
      }
      if (amount>=7)
      {
      amount=amount-7;
      System.out.println(number.replaceAll("7","Seven"));
      }
                              if (amount>=6)
                               {
                                amount=amount-6;
                               System.out.println(number.replaceAll("6","Six"));
                              }
                              if (amount>=5)
                               {
                                amount=amount-5;
                               System.out.println(number.replaceAll("6","Five"));
                              }
                              if (amount>=4)
                               {
                                amount=amount-4;
                               System.out.println(number.replaceAll("4","Four"));
                              }
                              if (amount>=3)
                               {
                                amount=amount-3;
                               System.out.println(number.replaceAll("3","Three"));
                              }
                              if (amount>=2)
                               {
                                amount=amount-2;
                               System.out.println(number.replaceAll("2","Two"));
                              }
                              if (amount>=1)
                               {
                                amount=amount-1;
                               System.out.println(number.replaceAll("1","One"));
                              }
   }
  }       

[RedSon]

Woah this code is a nightmare! The problem you are having is because your code is unreadable, it is also going to be very difficult to maintain, what if I was to input 3000 or 4000 or even 10000. You must think of a much more elegant solution to this problem then massive ifs like you have. When your design is better your problem will fix itself.

[RedSon]

Why did you not take the suggestion of using the % operator?

[cess]

Why did you not take the suggestion of using the % operator?

tnx for the comment!! I will try % operator..

[reon]

HI cess

Your idea is great...
But you didnt specify 11 to 19...
I am a newbie in java .. the only thing i found inside that code is that....

[reon]

and one more thing you didnt entered zero

[chuwfan]

Why did you not take the suggestion of using the % operator?

Sorry cause i a newbie in java, maybe this is a stupid question,
but may i know what is the % operator or may i know where can get this information?
i try to search at google.com but i can't really get what it means at all.

Thanks.

[RedSon]

Its call a modulus operator or mod operator, try googling for that instead.

[chuwfan]

Its call a modulus operator or mod operator, try googling for that instead.

Thanks for the information, i will study it at google.

[SammyB]

Thanks for the information, i will study it at google.

You also want to use a hash table. Here it is in C#.

public static string NumberToWords(int num)
{
Hashtable htb = new Hashtable(); 
htb.Add(0, "no"); 
htb.Add(1, "one"); 
htb.Add(2, "two"); 
htb.Add(3, "three"); 
htb.Add(4, "four"); 
htb.Add(5, "five"); 
htb.Add(6, "six"); 
htb.Add(7, "seven"); 
htb.Add(8, "eight"); 
htb.Add(9, "nine"); 
htb.Add(10, "ten"); 
htb.Add(11, "eleven"); 
htb.Add(12, "twelve"); 
htb.Add(13, "thirteen"); 
htb.Add(14, "fourteen"); 
htb.Add(15, "fifteen"); 
htb.Add(16, "sixteen"); 
htb.Add(17, "seventeen"); 
htb.Add(18, "eighteen"); 
htb.Add(19, "nineteen"); 
htb.Add(20, "twenty"); 
htb.Add(30, "thirty"); 
htb.Add(40, "forty"); 
htb.Add(50, "fifty"); 
htb.Add(60, "sixty"); 
htb.Add(70, "seventy"); 
htb.Add(80, "eighty"); 
htb.Add(90, "ninety"); 
if (num<0 || num>99) return num.ToString();
if (num<20) return htb[num].ToString();
if (num%10 == 0) return htb[num].ToString();
return htb[(num/10)*10].ToString() + "-" + htb[num%10].ToString();
}

This is only for 0-99 because that's all i needed, but it's easy to extend. Just add hundred and thousand to the hash and do a few more DIV' and MOD's. But, sorry, I don't do Java.